Apparatus for coating metals.



INVENTOR em pwugm flhq Ze'wa ATTORNEYS MM Y M J. F. MONNOT. APPARATUSFOR COATING METALS. APPLICATION FILED DEG.26,1905.

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UNITED STATES JOHN FERREOL MONNOT, OF NEW YORK, N Y.

APPARATUS FOR COATING METALS.

Specification of Letters Patent.

atented April 30, 1907.

Applicationfiled December 26, 1905. Serial No. 293,411.

To aZZ whom, it may concern..-

Be it known that I, J on FERREoL MON- NOT, a citizen of the UnitedStates, residing in the city, county, and State of New York, haveinvented certain new and useful Apparatus for Coating Metals; and Ihereby declare the following to be a full, clear, and exact descriptionof the same, such as will enable others skilled in the art to which itap- IO pertains to make and use the same.

My invention relates to improvements in apparatus for coating metals,and is particularly intended for use in producing compound metal bodiescomprising a base or core and a 1 metal coating therefor 'weldedtogether,'ac cording to the process set forth in my applicationforLetters Patent filed June 18, 1905, Sr. No. 265,508. According to saidprocess, a base or core of the metal to be coated, pref- 1 2'0 erablyafter being first thoroughly cleaned, so as to present an absolutemetallic surface, and after preliminary heating, has contacted with itssurface a mass of the desired coating metal in amolten condition, aportion of the J2 molten metal in immediate proximity to the surface ofsuch core or base being then segregated from the remainder of such massand allowedto solidify upon such core or base. Preferably, the coatingmetal so employed is 1 o heated to a point far beyond the melting point,at which it appears to display chemical activity, uniting readily withthe core or base to form a welded-on film coating which unites the coreor base and thecoating metal 5 after solidification of the latter, thusfirmly welding them together. Said process is ap- 1 plicable to theproduction of ingots, plates, slabs, and the like, which are intended tobe worked or extended by further treatment 40 into plates, sheets,tubes, wire, structural shape, and other .manufactured articles. Saidprocess is also applicable to the coating of articles which are not tobe extended subsequently by working.

My invention consists in the novel con- 'struction of the apparatus; inmeans for mechanically segregating from the body of molten metal incontact with the core or base, a portion or layer thereof of suitablethickness -for forming the desired coating; and

generally in the features hereinafter described and particularly pointedout in the claims.

The objects of my invention are to pro- 5 5 vide simple and efficientapparatus for forming a coating on a core or base by the segregationprocess, and to make the same quickacting, easily operated, andrelatively inexpensive.

I will now proceed to describe my invention with reference to theaccompanying drawings, illustrating one form of apparatus embodying myinvention, and will then point out the novel features in claims.

In the said drawings, Figure 1 shows a side 6 view of said apparatus,and Fig. 2 a front view thereof, the apparatus being shown, in eachview, in connection with a receptacle containing molten coating metal,such receptacle being shown in section. Figs. 3 and 4 are detail viewsillustrating alternative eonstructions.

In the said drawings, 1 designates the said receptacle, which may be asuitable crucible containing the molten coating metal.

' The apparatus herein described is designed- For holdin t e coreorbillet I rovide a, WWW '51 s iece 3 and connectin r0 4. This frame sprovi c with a center rod5 provided with an adjustable centering point6, and the bottom plate 1 is providedwith a corresponding centeringpoint 7. Thebillets or cores to be coated are customarily provided atthe ends with centering recesses, adapted to receive these centeringoints. A billet or core so held is accurate y centered with respect'tothe segregating shella necessity for accurate yrork. The said supportingframe is customarily sup orted in such manner that it may be raised andlowered readily, as for example by a pneumatic hoist 8, which may formpart of a suitable crane, not shown.

U on the side rods 3 is mounted a sliding hea or chuck 9, carrying thehollow shell or cylinder 10 of such size as to inclose between it andthe core or base a layer of molten coating metal of the desiredthickness. This head and the segregating shell or cylinder carried by itare arranged to be raised and lowered by suitable means, as for examplepneumatic hoists 11. The cylinders 12 of these hoists 11 are carried bya cross-head 13 which moves with the supporting frame raised and loweredby hoist 8. The arrangement s I therefore, that the entire structurecomprising said frame, with the ingot or core therein, and shell 10, andthe hoists 11, are raised and lowered by hoist 8 without .necessaryrelative movement of any of said parts, while said shell 10 may beraised and lowered, with reference to the core or billet, by means ofhoists 11.

In the operation of my apparatus, a core or billet to be coated issecured in the supporting frame by means'of the centers 6 and 7, Whilesaid frame is clear of receptacle 1, and then said frame, with the coreor billet ten metal in the receptacle 1, the shell 10 being in itselevated position. The shell 10 is '0 en lowered rapidly by means of the.hoists 11. Said shell in its descent segregates from the mass of moltenmetal in the receptacle, a layer thereof of suitable thicknessimmediately surrounding the core or base. Said shell further formssubstantially a fluid-tight joint 'with the bottom plate 2, for whichpurpose said shell may have a V- shaped lower edge fitting into acorresponding circular recess 14 in plate 2. The supporting frame isthenraised from the molten metal by means of hoist 8, the shell 10 beingstill in its lower position. The chuck 9 is then opened, the shell 10and its contents removed, a new casing or shell inserted in the chuck, anew object to be coated placed in the frame, and the operation isrepeated. ,After sufficient time for thesetting of the molten metal haselapsed, the shell 10 is removed from the coated article, as may be donereadily after the molten metal has set and cooled somewhat, and theshell may then 'be used'o'ver again.

When, as is preferably the case, the molten metal used is in thesupermolten condition, only a few seconds need elapse between thelowering of the core or base into the molten metal and the dropping ofthe shell 10; and the core, with the shell surrounding it, should beremoved from the molten metal as soon thereafter as practicable,thisbecause only a brief contact of the molten metal, when in thesupermolten condition, is required to form the alloy film which bindsthe core and coating together, while longer contact of the core with thesupermolten coating metal may. result in too great penetration of thecore by the molten metal, with consequent injury to the product.

I customarily cover all parts of the apparatus which are to be exposedto the molten metal with a protective covering, such as a plumbagopaint. reason of the use of this'protective covering, and also becausethe metal tends to shrink away from the inner surface of the shell 10,the molten metal does.

not attack the parts of the apparatus, but attacks only the core to becoated.

6 5 When the article to be coated is not cylintherein, is lowered untilimmersed in the molmovable segregating "carried thereby, and

venting it from turning with respect to the shell, thus keeping saidarticle symmetrical therewith, or equally distant therefrom at allpoints; one such means being duplicate centering points 7, arranged asshown in Fig. 3. Instead of employing a supporting frame for the articleto be coated, said article may be secured to the center rod 5,-and mayhave the bottom plate 2 secured to it, as shown in Fig. 4. This is anobvious equivalent of the construction first illustrated.

What I claim is: 1. In an apparatus of the class described, thecombination with means for supporting an object to be coated, and forcontacting the same-with-moltemmetal, of relatively movable segregatingmeans, adapted to operate after such contact occurs, and to segregatefrom such metal, a layer thereof, in immediate proximity to said object.

2. In an apparatus of the class described, the combination with meansfor supporting an object to be coated, and for immersing the same inmolten metal, of relatively movable segregating means, adapted tooperate after such contact occurs, and to segregate from such metal, alayer thereof, in immediate proximity to said object.

3. In an apparatus of the class described, the combination with meansfor supporting an object to be coated and for contacting the same withmolten metal, of a movable casing adapted to inclose a portion of suchmolten metal in proximity to the surface of such object, and means forguiding and operating such casing.

4. In an apparatus of the class described, the combination withsupporting means, of a casing adapted to segregate from a body 0 moltenmetal a layer of such metal in immediate proximity to the surface of anobject to be coated, and means for operating the casing.

5. In an apparatus of the class described, thecombination with a supportcomprising means for holding an object to be coated, of a movablesegregating casing suitably guided, and means for operating the same.

6. In an apparatus of the class described, the combination with asupporting frame comprising means for holding an object to be coated, ofa movable segregating casing guided by said frame, and means foroperating the same.

7. In an apparatus of the class described,

the combination with a support, of a segregating casing suitably guided,means for raising and lowering said support with the casing, and meansfor moving said casing with respect to the support.

8. In an'apparatus of the class described, the combination with acrosshead, a support a segregating casing movably mounted on saidsupport, of means drical, suitable means are provided for preobject,said frame comprising an end-piece for said casing adapted to close oneend thereof when said casing is moved over such object.

11. In an apparatus of the class described, the combination withsupporting means provided with means for holding an object to be 20coated, and means for contacting an object so held with molten metal, ofa segregating casing adapted to inclose such object after the same hasbeen so contacted with the molten metal, and means for operating saidcasmg.

12. In an apparatus of the class described, the combination withsupporting means of a relatively movable holding device mounted thereon,and arranged to hold a segregating casing and means for operating thesame.

In testimony whereof I afiix my signature, in the presence of twowitnesses.

JOHN FERREOL MONNOT.

Vitnesses:

JNO. B. HANNUM, Jr., W. I. SCHAFFER.

